Kylie Jenner, who is the half-sister of Kim, Khloe and Kourtney, has not only dyed her hair blue and received countless ear piercings, but has now taken up tattooing – despite only being 16.

The teenager was caught on video inking her initials on to Lionel Ritchie's son's hand after accompanying her pal to a tattoo session.

In a clip obtained by TMZ, Kylie can be seen with her hands on top of tattoo artist John Petro's, with the artist guiding her as they inked the letters 'KJ' on to Miles Ritchie's mitt.

WHAT DO WE HAVE EAR: Kylie has indulged in several ear piercings [INSTAGRAM]

While it wasn't technically Kylie controlling the needle, her participation in the process is still illegal.

According to the LA County Department of Public Health, only those over the age of 18 can give tattoos – which could mean Kylie could be fined up to $1,000 or given a misdemeanour if authorities decided to pursue the matter.

Petro, who has tattooed human doodle pad Lil Wayne and Soulja Boy, could also have his licence suspended for letting Kylie help out.

To be honest, we're more worried for 19-year-old Miles, who now has Kylie's initials inked on his hand until the end of time (or until he gets the tatt lasered off).

This is just the latest rebellious act from Kris Jenner's daughter, who has become quite the socialite despite her young age.

SELFIE STORM: Many thought this pic was too mature for the teens [INSTAGRAM]

She caused a mini Twitter scandal last week after she posed in bed with a topless Jaden Smith, and also shared pictures of multiple new rings and studs in her ear cartilage.

In another selfie, the teen posed provocatively with her stomach exposed, writing: "Don't mean to make you feel how I was feeling" while standing against a wall of flowers given to big sis Kim for Mother's Day.